| Glossary Term starting with J |
| Search SeaLifeBase |
| J.F. Bell Museum of Natural History, Minneapolis |
| J.L.B. Smith Institute of Ichthyology, Grahamstown |
| Jack |
| Jacks and pompanos |
| Japan Sea |
| Japanese threadfin bream |
| Japanese trawl |
| Java Sea |
| Jawfishes |
| Jaws |
| Jean P. Haydon Museum |
| Jellied eels |
| Jellyfish |
| Jellynose fishes |
| Jennie |
| Jersey fish |
| Jerusalem Museum |
| Jetsam |
| Jig |
| Jigger |
| Jigging |
| Jill |
| Jordan's Rule |
| Jugal |
| Jugular |
| Junior homonym |
| Junior synonym |
| Jurassic |
| Justified emendation |
| Jutjaws |
| Juvenile |
| Juvenile stage |